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Metallized isolated scintillation ceramic array structure and preparation method thereof

A technology of scintillation ceramics and array structure, used in manufacturing tools, stone processing equipment, stone processing tools, etc., can solve the problems affecting detector clarity, radiation intensity crosstalk, array element information distortion, etc., and achieve strong X-ray absorption and Isolation capability, improved signal-to-noise ratio and resolution, effect of eliminating scattered line artifacts

Active Publication Date: 2020-12-04
肖贵遐
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] An important factor affecting CT clarity is scattering. There are two types of scattering, one is the scattering of X-rays, and the other is the scattering of fluorescence excited by X-rays inside scintillation ceramics; in actual work, X-rays irradiate scintillating ceramic materials above, it is absorbed by the scintillation material and produces secondary fluorescence; the propagation of X-rays in the scintillation ceramic material is gradually attenuated with the propagation distance, and there is a certain propagation distance. If there is no X-ray isolation blocking material between the array elements, the X-ray Rays will pass through the partition between array elements and crosstalk to adjacent array elements, especially when the X-rays are not perpendicular to the scintillation ceramic surface, the crosstalk of X-rays will lead to crosstalk of radiation intensity between array elements, resulting in information distortion; The secondary fluorescence excited by X-rays will propagate in materials with a certain light transmittance. If there is no high secondary fluorescence isolation, the propagation of secondary fluorescence in scintillation ceramic materials will occur, forming light crosstalk interference. , will also lead to the distortion of the information of the array element and affect the clarity of the detector

Method used

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  • Metallized isolated scintillation ceramic array structure and preparation method thereof
  • Metallized isolated scintillation ceramic array structure and preparation method thereof
  • Metallized isolated scintillation ceramic array structure and preparation method thereof

Examples

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Embodiment 1

[0036] Such as Figure 1~4 The metallized and isolated scintillation ceramic array structure in this embodiment includes a scintillation ceramic block 1, on which scintillating ceramic block 1 is provided with criss-cross and interconnected slits 2, and both ends of the slits 2 communicate with the peripheral surface of scintillation ceramic block 1 The upper surface of the scintillation ceramic block 1 is divided into a plurality of scintillation ceramic array elements 4 distributed in a square array with the same size by the slot 2, and each slot 2 is filled with high-density sintered metal for isolating each scintillation ceramic array element Metallized isolation layer 3, the high-density sintered metallized isolation layer in this example is formed by sintering silver paste, and the silver paste is prepared according to the commonly used conductive silver paste for filters. The high-density sintered metal material can reduce the scattering of X-rays and secondary fluoresc...

Embodiment 2

[0051] The steps for preparing the scintillation ceramic array structure in this example are as follows:

[0052] Step 1: prepare scintillation ceramic powder slurry according to the ratio in the prior art, pour the scintillation ceramic powder slurry into a mold to make a raw scintillation ceramic blank; The sintering temperature is 1700°C, and the heat preservation is 9 hours. After a high-temperature sintering, it is cooled to form a flashing ceramic block;

[0053] Step 2: Fix the scintillation ceramic block on the substrate with glue, and use a diamond cutting knife to cut a plurality of criss-cross and interconnected grooves on the upper surface of the scintillation ceramic block. The depth of the cut grooves is the same as the total thickness of the scintillation ceramic block, that is Completely cut through the scintillation ceramic block, the width of the slit is 200 μm, the two ends of the slit are connected to the peripheral surface of the scintillation ceramic bloc...

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Abstract

The invention discloses a metallized isolated scintillation ceramic array structure and a preparation method thereof. The scintillation ceramic array structure comprises a scintillation ceramic block,the scintillation ceramic block is provided with a plurality of cutting grooves which are communicated in a criss-cross mode, the cutting grooves divide the upper surface of the scintillation ceramicblock into scintillation ceramic array elements which are distributed in an array mode, and each cutting groove is filled with a sintering type high-density metallization isolation layer. The invention also discloses a preparation method of the scintillation ceramic array structure. The preparation method comprises the following steps: cutting criss-cross communicated cutting grooves in the surface of the scintillation ceramic block to form the scintillation ceramic array structure; immersing the scintillation ceramic array structure into the high-density metallized slurry; performing high-temperature sintering; taking out the scintillation ceramic array structure for cooling after high-temperature sintering; and finally, grinding the array surface of the scintillation ceramic array structure. Scattering of X-rays and secondary fluorescence scattering can be reduced, information distortion of array elements can be prevented, and therefore the resolution of the detector is improved.

Description

technical field [0001] The invention relates to a metallized isolated scintillation ceramic array structure and a preparation method thereof. Background technique [0002] With the continuous development of modern industry and medical technology, new digital industrial diagnosis and medical imaging technology, such as X-ray computed tomography (X-CT), positron emission computed tomography (PLT), cardiovascular angiography ( The emergence and development of DSA), etc., have put forward higher and higher requirements for high-definition and high-resolution structure and performance of scintillation material array elements used in these technologies. [0003] High-definition and high-resolution CT applications require high-isolation array receiving elements. There is no scattering between the elements, which can make digital images clearer and is the driving force for application. For this type of detector unit, the existence of scattered rays becomes the main factor restricti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/88B28D1/22
CPCB28D1/22B28D1/221C04B41/5116C04B41/5127C04B41/88C04B41/4539C04B41/0072
Inventor 肖贵遐
Owner 肖贵遐
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